jpountz commented on code in PR #907:
URL: https://github.com/apache/lucene/pull/907#discussion_r880758668
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lucene/core/src/java/org/apache/lucene/index/MappedMultiFields.java:
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@@ -43,8 +43,8 @@ public MappedMultiFields(MergeState mergeState, MultiFields
multiFields) {
@Override
public Terms terms(String field) throws IOException {
MultiTerms terms = (MultiTerms) in.terms(field);
- if (terms == null) {
- return null;
+ if (terms == null || terms == Terms.EMPTY) {
Review Comment:
can we leave the `if` statement as is?
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lucene/core/src/java/org/apache/lucene/index/CheckIndex.java:
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@@ -1378,7 +1378,7 @@ private static Status.TermIndexStatus checkFields(
computedFieldCount++;
final Terms terms = fields.terms(field);
- if (terms == null) {
+ if (terms == Terms.EMPTY) {
Review Comment:
We should remove this `if` statement. There is a check a few lines above
that indexing is enabled on the field, so terms must not be null.
##########
lucene/core/src/java/org/apache/lucene/index/FrozenBufferedUpdates.java:
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@@ -595,7 +595,7 @@ private void setField(String field) throws IOException {
DocIdSetIterator nextTerm(String field, BytesRef term) throws IOException {
setField(field);
- if (termsEnum != null) {
+ if (termsEnum != null && termsEnum != TermsEnum.EMPTY) {
Review Comment:
would it work to leave the `if` statement as is?
##########
lucene/test-framework/src/java/org/apache/lucene/tests/codecs/asserting/AssertingPostingsFormat.java:
##########
@@ -79,7 +79,10 @@ public Iterator<String> iterator() {
@Override
public Terms terms(String field) throws IOException {
Terms terms = in.terms(field);
- return terms == null ? null : new
AssertingLeafReader.AssertingTerms(terms);
+ if (terms == Terms.EMPTY) {
Review Comment:
let's remove this check, and assert that `terms` in not null (`terms(String
field)` map only get called on codec APIs if the field is indexed
##########
lucene/codecs/src/java/org/apache/lucene/codecs/bloom/BloomFilteringPostingsFormat.java:
##########
@@ -200,8 +200,8 @@ public Terms terms(String field) throws IOException {
return delegateFieldsProducer.terms(field);
} else {
Terms result = delegateFieldsProducer.terms(field);
- if (result == null) {
- return null;
+ if (result == null || result == Terms.EMPTY) {
Review Comment:
since there are no ghost fields anymore, we should be able to remove the
`if` statement entirely, does it cause test failures?
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